Cultured stone methods of manufacture

Plastic and nonmetallic article shaping or treating: processes – Random variegated coloring during molding – By compression in a closed mold cavity

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264 73, 264245, 264333, 501127, 524430, 524437, B29C 3912

Patent

active

060569042

ABSTRACT:
An improved, method of making a lightweight synthetic stone product mixing a white powdery mixture comprising approximately 20-90 parts by volume of Al.sub.2 O.sub.3 .multidot.3H.sub.2 O and about 10-80 parts by volume polyolefin, preferably a polyethylene such as LLPE, HDPE and Super Linear PE and polypropylene in a ratio of 30-60% by volume with a clear thermosetting resin in a ratio of about 40-70% by volume and a peroxide catalyst in about 0.1-5.0% by volume, and a pigment, if desired, with the clear thermosetting resin selected from the group of unsaturated polyesters, acrylic-modified polyesters and acrylics.

REFERENCES:
patent: 3814790 (1974-06-01), Kato et al.
patent: 4433070 (1984-02-01), Ross et al.
patent: 5286290 (1994-02-01), Risley
patent: 5304592 (1994-04-01), Ghahary

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